Chinese medicine is the quintessence of China. Many elderly people love to eat Chinese medicine when they are sick, thinking that it has low side effects, and many young people think so. Many elderly people will form the habit of taking Chinese medicine for health. Yes, there has been a saying of TCM health preservation since ancient times. So what should the elderly pay attention to when taking Chinese medicine for health preservation? Some old people like to make tea with Chinese herbal medicine, which is healthy and disease-proof. As we all know, it is necessary to choose suitable materials for drinking herbal tea. If there are no symptoms, long-term drinking will have adverse effects, such as boat-fruited Sterculia, cassia seed and licorice. Many people regard them as daily tea. In fact, these three teas are not suitable for the elderly to drink for a long time. Under normal circumstances, sore throat and hoarseness caused by wind-heat cold can be treated with boat-fruited Sterculia. When there are symptoms such as excessive internal heat, red eyes and pain, constipation, you can drink cassia seed; You can drink licorice when you often have palpitation and shortness of breath. But the amount and time of drinking must be adjusted according to the severity of the illness. Drinking boat-fruited Sterculia for a long time will cause side effects such as thin stool and chest tightness, so it should be used with caution for the elderly with sudden aphonia and spleen deficiency. Although cassia seed has the function of lowering blood fat, it is cold and cold. Eating too much will damage healthy qi and spleen and stomach function, and it will cause diarrhea for a long time. Glycyrrhiza uralensis Fisch has the effects of invigorating spleen and benefiting qi, clearing away heat and toxic materials, but it also has the effect of adrenocortical hormone. Eating too much will increase blood pressure, leading to edema and hypokalemia. In addition, making tea with dried flowers is not absolutely safe. For example, after drinking wild chrysanthemum tea, a few people have digestive tract reactions such as gastrointestinal discomfort, bowel sounds and loose stool. It is best for the elderly not to drink dried flowers and Chinese herbal medicines as supplements. Whether the dose is too large or too long, there may be toxic and side effects. Patients who are taking western medicine should pay more attention, because improper combination with western medicine may cause harm to the body.